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Diffstat (limited to 'gas/README.coff')
| -rw-r--r-- | gas/README.coff | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/gas/README.coff b/gas/README.coff new file mode 100644 index 0000000..46c61cd --- /dev/null +++ b/gas/README.coff @@ -0,0 +1,79 @@ +The coff patches intend to do the following : + + . Generate coff files very compatible with vanilla linker. + . Understands coff debug directives. + +Here are the guidelines of the work I have done : + + . Encapsulate format dependent code in macros where it is possible. + . Where not possible differenciate with #ifdef + . try not to change the calling conventions of the existing functions. + I made one exception : symbol_new. I would be pleased to hear about + a better solution. (symbols.c) + . Extend the use of N_TYPE_seg seg_N_TYPE tables so that segments can + be manipulated without using their format dependent name. (subsegs.c) + . Write a function to parse the .def debug directives + . Write two small peaces of code to handle the .ln directive. + . In write.c try to move all the cross compilation specifics (md_..) to + format dependent files. + . Encapsulate the data structures using generic types, macros calls. + . Added too much code to resolve the complexity of the symbol table + generated. Most of the code deals with debug stuff. + . Create another makefile, shorter, cleaner. + . Create a config.gas shell script to mimic the gcc,gdb... configuration + mechanism. This reduce the complexity of the makefile. + . Isolate the format dependent code in two files + coff.c coff.h + aout.c aout.h + elf.c elf.h [ Not yet ;-] + . added a little stack management routine for coff in file stack.c + . isolate os specific flags in m- files + +If further development is planed on it is should solve the following problems : + + . Encapsulate DESC & OTHER tests in a macro call. I'm not aware + of their exact semantics. + . Clean up the seg_N_TYPE N_TYPE_seg naming scheme + . Try to remove as much reference to segment dependent names as possible + . Find a cleaner solution for symbol_new. + . Report the modifications on vax, ns32k, sparc machine dependent files. + To acheive this goal, search for \<N_, sy_, symbol_new and symbolS. + . Allow an arbitrary number of segments (spare sections .ctor .dtor .bletch) + . Find a way to extend the debug information without breaking sdb + compatibility. Mainly intended for G++. + . should it do something to generate shared libraries objects ? + +I have tested this code on the following processor/os. gcc-1.37.1 was + used for all the tests. + +386 SCO unix ODT + gcc-1.37.1, gas, emacs-18.55 + +386 Esix rev C + gas-1.37/write.s + +386 Ix 2.02 + gas, all the X11R4 mit clients + +386 CTIX 3.2 + xsol (X11R4 solitary game), gas + +68030 unisoft 1.3 + the kernel (V.3.2) + tcp/ip extensions + bash-1.05, bison-1.11, compress-4.0, cproto, shar-3.49, diff-1.14, + dist-18.55, flex-2.3, gas-1.37, gcc-1.37.1, gdb-3.6, grep-1.5, + kermit, make-3.58, makedep, patch, printf, makeinfo, g++-1.37.1, + tar-1.08, texi2roff, uuencode, uutraf-1.2, libg++-1.37.2, groff-0.5 + +68020 sunos 3.5 (no, not coff, just to be sure that I didn't + introduce errors) + gcc-1.37.1, gas, emacs-18.55, gdb-3.6, bison-1.11, diff-1.14, + make-3.58, tar-1.08 + +68030 sunos 4.0.3 (idem) + gas + +I would be glad to hear about new experiences + + Loic (loic@adesign.uucp or loic@afp.uucp) + |